NJ gets access to tracing database
Here's a story, and I suspect the bottom line is the reporter didn't understand what they were writing about. It sounds as if NJ entered into a memo of understanding that lets it have tracing data beyond the usual "you wanted a gun traced, here are the results." That's always been allowed (and the story implies this, but does not make it clear, perhaps because that'd undercut the Mayors' group claims that the Tiahart or whoever Amendment inhibits law enforcement).
I'd assume the MoU required NJ to guarantee that the data would be used for law enforcement and not for setting up civil suits.